Sound reproducer



Dec. 31, 1929. LE ROY w. sT'lluJxvroN4 SOUND REPRODUCER .Filed oct. 6. 1926 ATTORNEY .l

Dec.. l, 929. LE ROY w. STAUNTON SOUND REPRODUCER 'Filed oct'. 6. 192e f 2 Sheets-Sheet 2 INI/ENTOR. C@ S104; QW, @Siam/Few,

' ATTORN Y Patented Dec.' 31, 1929 f' UNITED STATES PATENT "o1-FICE ,i

LE ROY W. STAUNTON, F JACKSON HEIGHTS, NEW YORK, ASSIGNOR TO BRANDES LABORATORIES, INC., OF NEWARK, NEW JERSEY, A CORPORATION OF NEWrJERSF-V SOUND REPRODUCER Application filed October 6, 1926. Serial No. 139,907.

My invention'relates broadly to sound reproducing `diaphragms and more particularly to a conical shaped sound reproducing dlaphragm. I

One of the objects of my invention 1s to provide a mounting for a conical shaped sound reproducing diaphragm 'whereby the diaphragm is supported at the apex with the edge thereof substantially uncontined for vibration. n

Another object of my invention is to provide means for mounting a conical shaped r sound reproducing diaphragm where the peripheral edge of the diaphragm is substantially floating, the vibrations being imparted to the diaphragm at Kthe apex thereof with means for preventing injury to the freeV edge 4of thediaphragm. i

"My invention will be more clearly under- A zg'stood from the specification hereinafter following by refe'rence to thenaccompanying f drawings wherein Figure 1 is a front elevation of a sound rey roducer embodying thel principles of my invention; Fig. 2 is a plan view of the sound reproducer of my invention with the diaphragm partially broken away andshown in cross-section for more clearly illustrating the nature of my invention; Fig. 3 isa detail enlarged sectional view illustrating the devices which I may employ for protecting the edge of the cone and Fig. 4 is a side elevation illustrating the actuating link which extends between thecone andthe driver and showing the supportfor the driver.

My invention has been illustrated as applied to a cone speaker having an elliptically shaped sound reproducing diaphragm which issubstantially unconinedat its edge and .is supported fromiits apex at which point .*f'vibratlons are impressed upon .the diaphragm .from the driver. In order to protect'the free edge of the diaphragm I provide diametrically opposed strip members for centering the diaphragm within a suitably apertured plate member. The strip members are comi. posed of soft material which do not function inthe sound reproducing process but serve merely as centering means for maintaining ythe conical shaped diaphragm in position with respect to the centering plate. The dia- .n phragm is then free to vibrate and is sub-g f stantially unconlined at its edge, vibratory movement being imparted to the diaphragm contour of the peripheral edge `of the soundreproducing diaphragm. An electromagnetic driver has been representedat 4 which' is supported in spaced relation to the plate 2 by any suitable means, such as arm members 5 connected to support 19. The sound reproducing diaphragm is illustrated at 6 as consisting of an elliptically shaped surface in the form of a cone supported from its apex 7 by means of an actuating link 20 which extends from the electromagnetic driver 4. The peripheral edge 8 of the sound reproducing diaphragm is free to vibrate and is centered with respect to the plate 2 within the aperture 3 by means of the soft strips 9, 10, 11 and 12. The strips 9, 10, 11 and 12 may be of' rubber or felt or other flexible or resilient material which has no properties for the reproduction of sound. The strips are attached by means of a layer of glue or suitable cement 16 to the edge4 of the cone and at the opposite end the strips are attached by a similar layer of adhesive 15 to the edgeof the plate 2. The strips serve to center the Adiaphragm within the aperture 3 in the plate 2, leaving an annular gap 14 between the free edge of the cone 8 and the inner wall of the aperture 3. The edge of the cone terminates substanitally in the plane of the plate 2.

While I have described my invention in a certain preferred embodiment, I desire that it be understood that modifications mayl be made and that no limitations-upon my invention are intended other than are imposed by the vscope of the appended claims.

What I claim is new and desire to secure by Letters Patent of the United States is as follows 1. A sound reproducer comprising a vitending over the rear surface of said diareproducingv diaphragm, a mounting plate having an aperture in which the peripheral edge of said diaphragm is iiree tohoat and' a connection between said vibratile device and the apex of said elliptically shaped sound reproducing diaphragm, said connection serving to support said sound reproducing diaphragm, leaving the periphery' thereof,

substantially unconstrained and a plurality of exible felt strips extending between sepa-1 rated portion of the periphery of said diaphragm' and said mounting plate;

.2. ln a sound reproducing apparatus a mechanically vibrating device, a conical shaped sound reproducing-diaphragm supv ported at the apex thereof from said mechanically vibrating device, a plate member apertured to receive the free peripheral edgeof' said sound 'reproducing diaphragm and a plurality of flexible strip members each exphra m and connected with said plate meminf/aanre- LE ROY. `W. STA'UNTONA ber -or centering said diaphragm with re- .v

. ,bers secured to the spect to said plate member.

3. ln' a sound reproducing apparatus, a conical shaped diaphragm, an actuation means; A

for said diaphragm operating to support said diaphragm at its apex, a plate member apertured to enclose the free peripheral edge olf said conical shaped diaphragm, and a p lurality ofdiametrically opposed strip memsound reproducing y to center said diaphragm withinl said plate' member.

4. In a-sound reproducing apparatus, a conical .shaped diaphragm, anv -actuating means supporting said diaphragm at its apex, a plate member apertured to enclose the :tree peripheral edge of. said conical shaped diaphragm, and a plurality of elongated strip members extending between separated points along the rear surface of said sound reproducing diaphragm and attached to said plate member for centering said diaphragm with respect to said apertured plate member.

5. ln a sound reproducing apparatus, a cone shaped diaphragm having an elliptical periphery,'an actuating means Jfor said diaphragm, said diaphragm being supported at its apex by Said actuating means, a plate member apertured to enclose the ree peripheral edgeof said cone shaped diaphragm, a pairl of strip members secured -to the edge of said sound reproducingv apparatus along the minor axis thereof and a separate pair of strip members secured to the peripheralV edge of said sound reproducing apparatus along the major` axis thereof, said strip members being attached to said plate whereby the peripheral `edge of said cone shaped diaphragm is centered within said apertured tively spaced therefrom.V

6. ln a sound reproducing apparatus, the combination of a vibratile device, a conef plate and posi- (peripheral edge of said l iaphragm and serving 

